package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        //k拷贝
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //插入套餐信息
        setmealMapper.insert(setmeal);
        //获取插入的套餐信息id
        Long setmealId = setmeal.getId();
        //获取传入时的套餐和菜品关系信息
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        //将套餐id赋值给每个菜品信息
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品关系
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }


    /**
     * 批量删除套餐信息
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前当前是否起售中,是就不能删除
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                //当前菜品不能删除,在起售中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        ids.forEach(setmealId ->{
            //删除套餐信息
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中信息
            setmealDishMapper.deleteBySetmealId(setmealId);
        });

    }

    /**
     * 根据id查询套餐信息
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //查询套餐信息
        Setmeal setmeal = setmealMapper.getById(id);
        //查询套餐菜品关系
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        //把数据复制到套餐实体类
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        //给关系字段复制
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */

    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        //复制
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        //获取修改的id
        Long setmealId = setmealDTO.getId();
        //删除套餐和菜品关联表中的关系
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 设置套餐起售情况
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //判断是否有停售菜品
        if (status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId();
            if (dishList!=null && dishList.size()>0){
                dishList.forEach(dish -> {
                    if (StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
}











